Apparatus for making jiggered pottery ware



May 2, 1950. w. J. MILLER APPARATUS FOR MAKING JIGGERED POTTERYWARE Filed May 22, 1946 5 Sheets-Sheet l INVENTOR l 16 2] figf .2.

M y 1950 w. J. MILLER 2,506,378

APPARATUS FOR MAKING JIGGERED POTTERYWARE Filed May 22, 1946 5 Sheets-Sheet 2 115 Q 114 117 I16 I16 I 119 .15 W 1 6/20 I [l2 /109 122 INVENTOR May 2, 1950 w. J. MILLER APPARATUS FOR MAKING JIGGERED POTTERYWARE 5 Sheets-Sheet 3 Filed May 22, 1946 INVENTOR Wyllz'a'm J [ff/[91? F- 5 BY I h 4 lg yw jiATTORNEYj y 1950 w. .1. MILLER 2,506,378

APPARATUS FOR MAKING JIGGERED POTTERYWARE F'i'led May 22, 1946 5 Sheets-Sheet 4 I16 159 I2 I l aNvE-NToR WF/[z'am J M71912 y 2, 50 w. .1. MILLER 2,506,378

APPARATUS FOR MAKING JIGGERED POTTERYWARE Filed May 22, 1946 5 Sheets-Sheet 5 59 p v. ,//27 J9\ 1J6 Patented May 2, 1950 APPARATUS FOR MAKING JIGGERED POTTERY WARE William J. Miller Pittsburgh, Pa., assignor to Miller Pottery Engineering Company, Swissvale, Pa, a corporation of Pennsylvania Application May 22, 1946, Serial No. 671,478

14 Claims.

This invention relates to an apparatus for making jiggered potteryware. It has to do particularly with machinery of a semi-automatic nature for making jiggered dinnerware and the like and a method of making jiggered dinnerware which may be practiced with said machinery.

In conventional practice, when making jiggered ware by hand, it is customary to bat out the clay and then throw the batted out material onto the molding surface of the mold. This operation is performed by a highly skilled craftsman called a batter out." After the material is applied to the mold, it is jiggered by first placin the mold in a revolving chuck and then bringing an edged profile tool into engagement with the material. This operation is performed by another skilled craftsman called a jiggerman who additionally trims off the excess material produced incident to jiggering and lubricates the ware during the jiggering, both operations being manually performed. These two individuals, the batter out and the jiggerman comprise a highly paid manual crew who work together as a team, sometimes with the aid of a mold runner.

It is among the objects of this invention to provide a semi-automatic jigger by means of which the batter out of the manual crew may be displaced and which will perform the operations of fabricating the ware, trimming and lubricating it automatically thereby eliminating the need for skilled craftsmen to jigger the material and thereby contributing to considerable reduction in the cost of manufacturing the product while at the same time, providing for a more uniform production throughout and an increase in the amount of ware produced. Another object is to provide an apparatus for making jiggered dinnerware by means of which the operation of batting out as ordinarily practiced in making ware of this type, may be eliminated and the clay form ing process thereby expedited.

Another object of this invention is to eliminate the need for skilled labor in the performance of the jiggering operation thereby further reducing the cost of manufacture. Another object is to reduce tool upkeep, cost and maintenance and to .5 material over the molding surface of the mold without stretching or tearing the material or producing folds or overlaps therein, by bringing to bear thereon, a plurality of implements formed for spreading out the clay and profiling it, said implements bein applied successively, starting with a tool at the center of the piece and followed one after the other by the other tools until the clay is fully spread and profiled. In this man- 1 her, the batting out operation as heretofore practiced is eliminated and the effect of batting out and jiggering are combined in one operation with consequent saving in time and labor.

With the exception of applying clay to the mold, which is preferably done by hand by the operator but could be performed mechanically as disclosed in my Reissue Patent 20,401, the other operations including that of applying lubricant to the ware and trimming the spare, are all performed automatically with mechanical precision and control. Apparatus constructed in accordance with this invention includes a unitary profile assembly composed of a plurality of sections or divisions each of which is formed to profile a given and different zone of the ware with some overlap if desired. Each tool section is or may be actuated and supplied with lubricant independently of all other tools and is individually adjustable and replaceable. Thus this profile assembly may be employed to practice the novel forming method hereof wherein the J'iggering or profiling process is sub-divided and carried out in progressive stepwise fashion, progressing from one zone of the ware to another to reduce the drag on the clay and progressively bond it to the mold, for instance, from the center or inside the foot ring to the perimeter or edge zone, without harmful slipping or creeping of the clay on the mold, distortion or stretching of the clay during the progressive action, or ripping thereof from the mold.

An advantageous feature of this invention resides in the fact that tool sections may be individually replaced without the necessity for removing the entire tool to refile a blunted portion. This saves metal and considerable refiling time and labor since the wear on the Working edge of a conventional profile tool is irregular and not all of the surface becomes unserviceable at the same time.

Another advantageous feature of this invention is that the application of lubricant to the surface of the ware may be made individual to each tool section and controlled so as to supply only the exact requirements thereof which may 3 vary from that required for other tools or ware zones.

Another advantageous feature is that each zone of the ware from the center brimwise may receive individual treatment in the spreading and profiling oi the clay. Thus such factors as the pressure required to spread and: profile the clay, the time of application and withdrawal of the tool, the duration of the profiling action etc. may all be individually regulated and controlled and varied when need be. r

In the drawings:

Figure 1 is a side elevation of a jiggering machine embodying my invention.

Figure 2 is a diagrammatic plan view on a smaller scale, of the base section of the machine.

Figure 3 is a sectional elevation through one of the mold supporting units.

Figure 4 is a piping and wiring diagram combined showing fiuid lines and electrical circuits of'the machine of Figure 1.

Figure 5 is an-elevation of'the preferred form of; profile assembly shown in association with a mold illustrated in vertical section.

Figure 6 is a plan view, partly'broken away of the profile assembly and mold of Figure 5.

Figure 7 is a sectional elevation through one ofthe tool sections of the profile assembly of Figures 5 and 6.

Figure 8 is. a detail in verticalsection showing how the angular position of the tool section may be adjusted.

Figure Sis a detail in bottom perspective showing the underneath portion oi one of the tool sections.

Figure 1G is a view of one of thejtool sections.

Figure 11 is a plan view showing a fiat ware jigger mold with a charge of clay thereon.

Figure 12' illustrates the first step in the fabrieating method wherein the. central Zone of the charge is. profiled.

Fig-ure 13 illustrates the next step. in the fabri-. cation of the ware wherein the. foot ring is formed.

Figure 1e illustratesanother step in the process of fabricating the ware wherein the verge zone of the. piece is formed.

Figure 15 is a plan view illustrating the finalstages of fabrication wherein the rim of the Ware is formed.

Figure 1515 a detail View, partly. in section of the die supporting means.

The method, andthe apparatus shown herein for practicing the method; are for-making mold bonded, jiggered ware in earthenware, semivitreous and; vitreous grades. This type of ware is made fromsplastio' mixtures of ceramic ma.- terials sometimes referredto herein by the more common. term clay. The clay: is formed. into ware in or on plaster molds of conventional type and form.

While we have shown herein certain apparatus ofa semi-automatic nature for fabricating the ware, it will be understood that the method may be practiced by hand.

The apparatus comprises, a frame having a base. plate 5 upon which some of the operating mechanism to be later described is mounted. Above the base is a shelf 2 upon which other operating mechanism and the mold chucking unit Sis supported. This shelfis carried by angles l -bolted to pairs of corner posts 5 and 6 respectively which support the top or table 1. The rear post extensions a extendi upwardly above using afihwwontrol valveii-therein which can be the table and are connected by a cross beam 9 near the top.

Mounted at the rear center of the table I is a pedestal it upon which a tool carrying lever i is pivotally mounted on shaft i2. Said lever has a rear extension upon which an adjustable counterweight i3 is slidably received. The tool id is adjustably mounted on the opposite end of the lever. This is accomplished by providing a pair of spaced, aligned slots l5 in the lever through which bolts iii are screwed into clamping plates 11, Figure 16, behind bifurcated attaching members i9 fixed to the tool head 23. When these-bolts are loosened, the tool may bemovedlongitudinally of the lever to proper operating'position. The tool may also be vertieerily-adjusted on the lever. For this purpose, each member :9 has an offset boss 2i screw threaded to receive adjusting screws 22, Figure 16.

An adjustable lever: stop.v is provided in the form of a screw 23 carried by. the lever ilk and: a screwid to be engaged thereby mounted. on

astationary extension 25 of pedestal it.

Lever llis automati'callyoperated by air cylin-...

der Ztwhosepiston rod 2lispivotallyconnected at 28 tothe lever between the fulcrum and the tool'end. The otherend of the-cylinder is..piv.

otally connected: at=29- to a bracket 38 at tached to cross beam 53. To-operate theair cylinder,

a flexible hose 3|, Figures land 4, is-connected'. to the upper end of thecylinder and to avalve. Said The compressor and pressure tank are mounted f on shelf 2; Figures 1 and 2, whereas the cam shaft 34-- is supported by a-bearing 38 mounted i on the base plate I.

Said camshaftis-driven by a pinion t6 fixed thereon which engages a pinion ti on clutch shaft d2. Mi ls a single revolution clutch whose drive shaft 44- is driven" by motor 15 through a variable'speed transmission 45 having a manual control wheel Astor regulating the speed; The starting of the single revolutionclutch iscontrolled by an electro-magnet sitewhich the clutch release rodd8 is attached. Said magnet" is connected in circuit with a push button switch 49 mountedon the side of one of the corner posts in a position conveniently accessible Thus, when the operator de- 5 pressesthe starter button 49, which he instantly to the operator.

releases; cam shaft as is then revolved which causes cam- 33 to effect the'lowering of lever H and the-tool supported thereby to working position.

As the-piston 50 of air cylinder 28 is moved downwardly the air there aheadof is exhausted throughair line 5-1 and flexible hose sand dis-r charged to atmosphere throughthe'vent side of;

valve 53, Figure 1;; whose valve operating plunger 54*has been depressedbycarh'SE oncamshaft 34 5 to thereby move the plunger to'a line Venting positionandto disconnect'hos e; 51 from air line 36;. In order to provide for asl'owapproach of the toolgto its working positiom'the connection beha-usted througha lower-secondary line 55 hav- 5 manually regulated to provide the desired speed of approach.

The manual operator may either place the charge of clay 58, Figures 5 and 11, on the mold 59 and then put it in the chuck 60, Figure 1 or else place the charge in position after the mold is seated in the chuck. The charge is preferably of disc like proportions, see Figure 11, and is placed on the center of the molding surface which in the case of the average dinnerware mold, would be the central elevated plateau 60. The charge contains a suihcient volume of clay from which to prepare the piece of ware and the charge may be formed mechanically by a conventional automatic or semi-automatic slice or cut off by hand at the jigger bench from 'a cylindrical pug of clay.

After the mold is placed in the chuck, the operator depresses the starting button 49 as aforesaid and, as the lever II approaches the working position, an adjustable trip Figure l, on screw 52 carried by the lever, engages and depresses the switch lever 63 of switch t i mounted on bracket 25. This switch is connected by circuit 65, Figure 4, with an electric motor 66, Figure 3, formed-as a part of the chuck supporting and rotating assembly 3, to thereby start the chuck and mold to rotating.

Said chuck supporting and rotating assembly comprises a spindle 68, Figure 3, upon which the chuck is fixed that is journaled in an elongated bearing 69 whose flange 69'- is seated in a groove in the end of motor housing 69a partly supported by flange 69%) from table 1. Sometimes, it is desirable to reciprocate the mold chuck and I have shown herein a chuck supporting and operating unit which will permit this action where necessary or required. The spindle 68 is in key sliding engagement with a sleeve I0 which is secured to the motor armature. On the reduced lower end II of the spindle, a piston I2 is mounted and this piston is enclosed in a cylinder casing 73 fastened to the motor housing. The spindle projects through a gland I4 in the cylinder cap I5 and has a, stroke regulating wheel I6 screwed on the lower end for adjusting the altitude of reciprocation of the chuck.

In order to vacuumize the chuck and thereby grip the mold thereto, said spindle has a vacuum passage "I1 bored axially therethrough and connected at the lower end to a vacuum hose 18 connected to a valve 10, Figure 4, having a valve op erating plunger 80 to be depressed by cam III 0n cam shaft 34 to connect hose I8 with vacuum line 82 leading to a vacuum tank 83 in which minus pressure is maintained by a motor driven vacuum pump 84. The pump and tank are mounted on shelf 2, Figure 1. Vacuum is connected to the chuck just prior to the commencement of rotation thereof and is disconnected by closing valve I9 and venting line I8 to atmosphere after the fabricating operations have been completed, preferably after the lever II has been elevated and the rotation of the chuck stopped.

For elevatingv the chuck, an air pipe 85, Figure 4 is connected to the lower end of casing I3 and to a valve 85 whose plunger 8'! is to be depressed by cam 88 to connect pipe 85 with pressure line 36. ahead of the piston I2 is forced out of the casing through pipe 80 into pipe 00 and vented through valve 9| whose plunger 02 is depressed bycam 93 simultaneously'with the release of plunger 81 thereby to disconnect pipe 90 from pressure line 36. In order to providefor a slow rise during the final stages ofchuck elevation,

the inlet to pipe 89 is spaced below the top of cylinder casing I3 and when piston I2 closes the inlet to said pipe, the air there ahead of is discharged through pipe 94 and manually adjustable reducing valve 95 into pipe 90. Pipe is provided with a shut-off valve 96 and pipe as is provided with a shut-off valve 91. If the chuck is not...

tened around the cylinder casing I3 and bolted to a cross beam IOI connecting the front cover posts 5.

The fabricating tool hereof includes a plu-v rality of individual clay spreading and profiling.

implements that are identical in construction except for differences in shape and contour of the working surfaces which are formed for accomplishing the three-fold purpose of profiling the clay, smoothing it and spreading the same toward the brim of the mold..

The clay working characteristics of the indi-v vidual implements will be separately discussed hereinafter as well as the location and disposition thereof relative to the surface of the mold and the manner in which they areoperated.

Sincethey are generally the same in structure,

I will first describe construction and the means for operating them, reference being had to Figures 7 to 10 inclusive.

Each implement has a lower, movable backing block portion I05- provided with a contoured clay engaging surface I06. A profile IIl'I is fastened to one side surface of this block by screws its in the same position it would normally occupy in the case of a conventional profile. tool assembly. The backing block is formed with a hollow sleeve I09 having radial ears vI I0 provided with slightly oversize, oppositely disposed bolt holes I I I. ihis sleeve is fitted over the hollow tubular end I I2 of a support H4 which has a reduced threaded end I I5 projecting upwardly through an oversize hole H6 in tool head 20 and secured in position by nut I I1. Support I I4 has a radial flange I I8 into which the hanger screws H9 which suspend the backing block 505 are screwed. The shanks of these screws are smooth throughout the midsection so that the backing block may move up and down on them within the limits permitted by the radial flange H8 and nuts I20, the latter being adjustable to increase or decrease the stroke which may be additionally lengthened by backing off screws H9.

- The backing block is adapted to move downwardly by air under pressure which is introduced into the hollow interior I2I through a passage I22 in the reduced end H5 of support IIA to which a hose connection is attached to be connected to a source of air under pressure as will be hereinafter described. To return the profile and backing block to raised position on the support lit, a spring I22 is provided which is connected by a screw I23 at the bottom of the hole to the backing block and has a hooked end I24 hooked over the top of the reduced end H5. The backing block and support may be-easily dissembled by unhooking the spring at the top and removing nuts I20.

In order to adjust "the angular position'of the] set screws l2fi seecFigures 7 and 8, .in.flange 1.1.3... which. bean on. theoundersidepf-.the. tool head-1231:: andcan be adjustedsmasta holdtheilnplement.

at; an. anglev t o...the vertical. .as. illustrated.

Figure 8..

- With referenceto Figure: 6., the implements numbered 126 is formediandipositioned so. as, to. actupon the central area; [21,. liigurex 11,..ot .the ware- 01 that are withintthesfoot; ring .1 2-8. This. implement is formed. with. a. profile; E21 that is. curved rearwardly from the tip [.38. .to. .the .right for-several degreesand. thenhas a straight: edge. portion 1 i 3 i. lying. along a chord. of. the. circle. of;

aefoot-ring. l 22.- Thebaeking block l 321s curred;- around. the implement. andthe leading face. E33 and the trailing edge: [3 L form extensions oi the; end faces of the profile. The clay engaging sur.-. faoeaof; this implement be tapered. inwardly towardzthe. profile. The implement ispositioned= with thetip. 5353 -01"; thetprofile slightly beyond the center. of rotation. oil thelinold. which; rotates in a clockwisedirection (see arrows).

Implement tfitis; the first one of the group; toact; upon theclaycharge. After thevlever H. is lowered and the mold commences ..to rotate, cam I35. on cam. shaftztll; Figure 4, depresses plunger. 5350f valve. I36 to thereby connect air hose 5.321 with pressure line 36. and this causes the profile lZt andbackingblock. 132 to movedowne, w'ardly: into the. centerof the clay charge 53,.- Eigure 11, and formv ahollow depression iii-8, Figure 12;. inythe-center. thereof. The clay. is. caused to flow toward the b rim 1351; of the-mold; and to form a thick ringlfidofesurplus material, Figure 12, extending. beyond or over? the limits of the. high centetplateauttof the,mold. The implement is preferably. moved gradually intothe clay so asnot. to tear theclay loose-from the moldto whichit; is. adhesively bonded, due to. the inherent stickiness oi the.clay..

Water may be applied tothe clay for. iubrication purposes coincident withthe. engagement of the. profile therewith. or before or afterrinitial; engagement and may; be-applied during the pros filing operationcontinuouslyor in a succession. oi jets. For this: purpose, av Water. spray Ml, Figure 5, is provided that :is supported; from. the tool. head by an adjustable. bracket M2 by meansof which. the angle and position of the nozzle sea may lie-manually,- changed so as to direct ti e. lubricationto the. desiredpoint on the, surface of the Ware-being; profiled. This water spray isconneotedby-a. water pipe ltfi to a main.

wisesinto and beyondthe icon ring;- 123;, zone...

see Figure 13. The profile 152 of thisiinplement'. iszstraight and.the,..backing .bloc1; 1153;. is erectangular. in. shape. The: clay. engaging surface oicthe block-is hroad-and'tapered towardthe-tool. andis provided withear oversizaclay; husbands... ing; groove L; contiguouslwith foot ringiorming;groove.-.l4 i, in profilelSZ Figure. 7,. how.-..

erenin this...cas.e, the grooves -are. oversize and actto. roughilout; theioot; ring. The. profile is.

setiat .an angle. tov-...the straight. edge portion. mi. of profile 1.29., Eigure 6,. so. as toreceive and; directthe. claypyen-onto theverge.. aone .l 5.0! of.- the. mold, see. Figure; 1a, whilst. forming; the, 1 foot;

3 ring [28, Figurelfi;

mi its associated. with implement I51, saidispray;

(shownldiagrammatically in. Figure 4) is, con.-

nested, by. hose. line L63 to; valve 7 EH whose plunger- It: istoi be. depressed; by. cam. L53.

connect nose. line; l50...to pr ssur line 3.6-.

Thenext impl mentto be applied to thQWOIk 'islfi which, may be.consideredjas hc; o t in finishing impl ment-, This imp ement has. a; curved profile H65 straddling the foot; ring zone i,- the. were andoverlappinsmesons profiled by implem nt i56 D e-.-;to he urrent. heprofil the. clays d r cted ntotm foot ring.v ne nd, bey nd to the verere.zon canclsenerally n r ma Wisedirecti as.. de ird-- Thebackins blo k. 65- in; this insta ce is;circular. inshape andhas a;

3.5;. larene'asin surface aperin towar the. profil provi ed. with a...tenerecl..clayx husban i e; oove in couticuouswhhthe. foot in e'roove 551. n h t ol;-

To. opera e his. imp em nt; hos i ili a tackl d hereto connec ed. o. a, valve fltwho plun er Ht? s ad p ed-to. be depres ed by a I It. to conne t. hose. .9.. wi h i h. pre u e line. 6;; To. pera e. the. spr y. 112-. associated. herewit ai hose. 1 l a-E eure 4: scq n c val-Ye. [lana /ins. a. p un e "Ho be epre by; Cami-15f hereby; o, conne tho e associated with the otherimplements; Said water-,- spray' has an air actuatedvalve which turns onthe water coincident with the discharge of air: through the nozzle thereby to-atomize, the water. This valve is shown diagrammatically at M5 in Figure 4 as being. connected to an-aii; hose: 3.1? leading to avalve. l t-shaving aplunger ftobe actuatedby. cam 15am connect hose lsl to pres--. sure line The time; duration anditrequency of water applicaticn-fer-any of theimplernents may be varied'to' suit and-willdepend, of coursel; upon the developinept;-of the cam. v

After the center i-theware has been prefiled and reduced to pr er thickness orprior to the. time the operation is completed, thenext im plement l, Figured may be causedtooperate. Th mp m po i i nedr s ast u on; the central zone of the were and to direct clay); heineedelivered hereto bieimplement 'li3-gbriiil pressure line 36.

The next: mplem nt. equen -t e atedis firFrisur fi w i arran ed-. fi

5% th bac f. the were erlyin the rs e i%i,.Fi ures .3.v and leans Wh se p fil o ll s setat an'anel'e suchthat the clay will e... d r cted o ar he r h mo dis; tool is substantiallythe'same as implement 25L except h t tdoe mt-havaanyero v in h clay e a ing rface here i z=. oopera e th s: tool, Which maybecaused to. engagethe ware. prior. to the completionofjhefoot ring 528 form, ing operation, an; hosellt; associatedtherewith:

6m connected-to valve llfivwhose plunger I19 is; to; be depressed by cam lfiil; to connectair lines 3%, therewith and-thus cause the profile to move: into engagement-with the-clay. To apply water; to the ware, the water spray l8l-, Figure 5, associ ated therewith has an air. hose 3.2, Figure 4, connectedwto a valve lfitywhoseplunger its is to bev depressed by cam to: connect. air line 36:

therewith. I

The last implement in sequence tobeoperated.

7 is I86 which is substantially the. ;same. as-imple-.

merit; i5 4 and is provided with a profile m having a rim forming groove;- 18.8; and a backingi block E89 havingahusbanding: groove I90 0011-; tiguous with groovew I This profile is curvedthe surplus; clay into:- the. brim;

i -tool I". To operate'this implement which may :be caused to' e'ngage the .wa-rewprior to completion rOf the verg'e-for-ming operation, aheaii' hose Hit,

TFig-ure l, is connected to valve 19 whose plunger #92 is to'bedepressed by cam iiit to connect air line 36 therewith. 'To "operate the associated water spray St, an air hose 195 is ccnnected to -valve 1% whosef'plunger it"! is to be depressed by cam I98 to connect air line 3'6 therewith. At this stage of operations, the yvare :will have become fully extended and the "back profiled somewhat -as'shown in Figure =15 and except for trim-hung -the excess clay from the 'brim'of the mold, the .sp'iece is' finished insofar asiclay state" formingis concerned.

Totrim the scrap-clay from'the -brim'zone of ethe mold, a trimming implement I 99, "Figured, :is

provided whichis similar in construction to the apron-ling implement except that "ithas' no 'tooland'instead is equipped with a"trimmer wire 280 or blade if desired. Thistrimrneris not-cperated until the surplus clay'has "been -:.pushe d ofi onto' the' brim of the -lllO1li.-by implement "l 86. "To

.operate thetrimmer,-an air-hose Zdli'isconne'oted fto valveiflf'l igure, whoseiplunger 2% isto be depressed by cam=2fl4 to "connect air linedt there- -With. Inasmuch'as the trimmer may cut or scratch the moldiif applied "too hardthere'to, I

:"ha've iprovided"for-stopping the'trirnmer at-a predeterminedievel. the -movable casing 265 ol the trimmer "has'a proj ec-tin'g "bracket 2% in which an-adiustable stopscrewtti, Figure :1, is

threaded. Thisscrevvds:adapted t'o engage a post 208 adjustably"supported-inn holder 25397bolted to the top' l ofthe-"frameh It is sometimes-"desirable to'spray'the "brimpf the m'oldtvith weft'en' particularly where the ware is being subsequently dried by infra-red heat.

Therefore, if'd'e's'ired, "an extra water spray Bid, Figure 4, may be .placed alongside the trimmer for this purpose, or if it is desired toblow the trimmingsofi the mold, the waterline may be disconnected and the spray used for this purpose. 1

To operatethis spray, an-air hose 2! I, Figure d, 'is connected -to--a'--valve 2 l 2 whose plunger 2 5 S is 1'99 be depressed by aca-m 2 hi to connect-air line 36 therewith.

As ,to the time of withdra-walof these several plements to the ware, that the area of clay bonded to the mold is always greater than the area being acted upon by the tools individually or collectively. To catch the scrap produced during jiggering,

the table I is provided with an enclosure 215 sur rounding the mold.

I claim:

1. Apparatus for making jiggered potteryware comprising, a frame, a mold support carried thereby, a tool support mounted thereon, a tool carried by said support, said tool including a pin rality of relatively movable implements formed for spreading and jiggering clay on the surface of pottery jigger molds, and means for moving said implements relative to one another and to iii plurality of relatively movable the -work to cause "-them to act progressively and individually and severally to spread clay :over the Ware forming surface of a mold and 'jigger the material.

2. Apparatus for making jiggered potteryware --comprising, a frame, :a mold support carried thereby, a tool support mountedzthereon, a tool carried by said support, said tool including a implements formed for spreading and ,jiggering clay on the surface of pottery jigger molds, and means for moving said implements relative to one another in successive order to cause them to act progressively and individually to spread clay progressively over the ware formingsurface of a mold fromthe center outwardly and ,jigger the material incident to spreading it.

3. fApparatustfor-making jiggered potteryware comprising, a frame, a .mold support carried thereby, a tool carriedby said support, means-for relatively rotating the mold support and tool, said tool including a plurality of relatively-movable implementsiformed .zfor spreading and jiggering clay onthe surfacerofpottery,jigger molds, and. means for movingsaid implements relative to one anotherto cause-them to act progressively and individually upon the'clay-and spread the same progressively from thelcentral region :of a mold to the brim zone and jigger the-material incident to spreading.

said implements relative to one another to cause them to act individually to spread clay progressively over the war forming surface ofv a mold "and jigge'rthe material incident to spreading it.

5. Apparatus for making jiggered potteryware comprising, a frame, a mold support carried thereby, a tool support mounted thereon, a tool carried by "said-support, said tool including a plurality of relatively movable implements'formed for spreading and jiggeri-ng clay on the surface of pottery 'giigger molds, fiuid operated meansior "moving said implements relativeto one another, and means forcontrolling'the operation of said 'fluid actuated means-whereby said implements are caused to act individually and in successive order to spread clay'progressivelyover the vlare 'forming surface oia'rnold-andjigger it.

6. Apparatus for making jiggered potteryware comprising, a frame, a mold support carried thereby, a tool support mounted thereon, a tool carried b said support, said tool including a plurality of relatively movable, fluid operated imple-- ments formed for spreading and jiggering clay on the surface of pottery jigger molds, fluid op erated means for moving said implements, power driven means for controlling the operation of said fluid operated means, manually operated means for starting the operation of said power driven means, and means for automatically stopping said power driven means.

7. Apparatus for making jiggered potteryware comprising, a frame, a rotatable mold support carried thereby, means for rotating said support, a movable tool support mounted on said frame, fluid operated means for moving said tool support, a tool carried by said support, said tool including a plurality of relatively movable,

fluid operated implements formed for spreading and jiggering clay on the surface of pottery jigger molds, and power means operable through a cycle to efiect operation of said fluid operated means.

8. Apparatus for making jiggered potteryware comprising, a frame, a mold support carried thereby, power means for rotating said mold support having a control, a tool support movable mounted upon said frame operable to actuate said control, fluid operated means for moving said tool support, a tool carried by said support, said tool including a plurality of relatively movable implements formed each spreading and jiggering clay on the surface of pottery jigger molds, fluid operated means for actuating said implements, and power means operable through a cycle for causing said fluid operated means to move said implements in successive order to operate clay progressively over the ware forming surface of the mold and jigger it.

9. Apparatus for making jiggered potteryware comprising, a frame, a rotatable mold support carried thereby, a tool support movable mounted upon said frame, fluid operated means for moving said tool support, a tool carried by said support, said tool including a plurality of relatively movable implements formed for spreading and jiggering clay, fluid operated means for actuating said implements, a plurality of spray heads for lubricating the surface of the clay being acted upon, fluid operated means for actuating said spray heads, trimming means, fluid operated means for actuating said trimming means, and power means operable through a cycle to effect the successive operation of said implements to spread clay progressively over the ware forming surface of a mold and to effect the operation of said spray heads and trimmer at predetermined intervals.

10. A tool for use in making jiggered potteryware comprising, a tool head, a plurality of implements formed for jiggering and spreading clay, and means for mounting said implements on said tool head including fluid operated devices by means of which each implement may be reciprocated relative to the work.

11. A tool for use in making jiggered potteryware comprising, a tool head, a plurality of r implements formed for jiggering and spreading clay, and adjustable means for mounting said implements on said tool head including fluid operated devices by means of which each implement may be reciprocated relative to the work.

12. A tool for use in making jlggered potteryware comprising, a tool head, a plurality of implements formed for jiggering and spreading clay, means for mounting said implements on said tool head having means for adjusting the position of each implement relative to the work, fluid operated devices by means of which each implement may be reciprocated relative to the work, and individually controllable means associated with each implement for applying fl-uid to the work.

13. A tool for use in making jiggered potteryware comprising, a tool head, a plurality of implements formed for jiggering and spreading clay, means for mounting said implements on said tool head having means for adjusting the position of each implement relative to the work, fluid operated devices by means of which each implement may be reciprocated relative to the work, individually controllable means associated with each implement for applying fluid to the work, and a fluid operated trimmer adjustably mounted on said tool head.

14. Apparatus for making jiggered potteryware comprising, a frame, a mold support carried thereby, a tool support mounted thereon, a tool carried by said support, said tool including a plurality of individually operable implements formed for spreading and profiling clay on the surface of pottery jigger molds, mechanical means for moving one support relative to the other to bring the tool into working position, means for rotatin one support relative to the other for jiggering purposes, and mechanical means operable to move said tools in predetermined sequence when in working position to progressively form the ware from the central zone outwardly to the rim zone.

WILLIAM J. MILLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,472,022 Cockbill et al. Oct. 23, 1923 1,757,132 Miller May 6, 1930 1,762,387 Dengler June 10, 1930 1,826,577 Schantz Oct. 6, 1931 2,293,070 Miller et al. Aug. 18, 1942 2,334,640 Miller Nov. 16, 1943 FOREIGN PATENTS Number Country Date 10,384 Great Britain June 6, 1900 

